This value is expressed in bytes for the OraBLOB and OraBFILE objects, or characters for the OraCLOB object. It is set before beginning a multiple-chunk read or write operation. After it is set, a series of Read or Write operations must be issued until the LOB Status property no longer returns ORALOB_NEED_DATA .This occurs when the PollingAmount bytes or characters have been read. Attempting to do other LOB operations before the end of the polling operation results in an error.

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